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Spark KeyFrames Effect in Flex4
Posted on: July 6, 2010 at 12:00 AM
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The keyframe defines the value of a property at a specific time during the effect.

Spark KeyFrames Effect in Flex4:

The keyframe defines the value of a property at a specific time during the effect. If your effect has just two keyframes use the Animate effect. The Animate effect has the staring and ending value for the property corresponding to two keyframes. The tag of KeyFrame is <s:KeyFrame>. The syntax of KeyFrame is following:

<s:KeyFrame
time=""
value=""
/>

In this example you can see how we can use the keyFrame in your application.

Example:

<?xml version="1.0" encoding="utf-8"?>

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"

xmlns:s="library://ns.adobe.com/flex/spark"

xmlns:mx="library://ns.adobe.com/flex/mx"

minWidth="955" minHeight="600">

<fx:Declarations>

<s:AnimateTransform id="keyframeEffect"

target="{footballImage}">

<s:motionPaths>

<s:MotionPath property="translationX" >

<s:keyframes>

<s:Keyframe time="250" value="0"/>

<s:Keyframe time="500" value="50"/>

<s:Keyframe time="750" value="100"/>

<s:Keyframe time="1000" value="150"/>

<s:Keyframe time="1250" value="200"/>

<s:Keyframe time="1500" value="250"/>

<s:Keyframe time="1750" value="300"/>

<s:Keyframe time="2000" value="350"/>

<s:Keyframe time="2250" value="300"/>

<s:Keyframe time="2500" value="250"/>

<s:Keyframe time="2750" value="200"/>

<s:Keyframe time="3000" value="150"/>

<s:Keyframe time="3250" value="100"/>

<s:Keyframe time="3500" value="50"/>

<s:Keyframe time="3750" value="0"/>

</s:keyframes>

</s:MotionPath>

<s:MotionPath property="translationY" >

<s:keyframes>

<s:Keyframe time="250" value="0"/>

<s:Keyframe time="500" value="150"/>

<s:Keyframe time="750" value="0"/>

<s:Keyframe time="1000" value="150"/>

<s:Keyframe time="1250" value="0"/>

<s:Keyframe time="1500" value="150"/>

<s:Keyframe time="1750" value="0"/>

<s:Keyframe time="2000" value="150"/>

<s:Keyframe time="2250" value="0"/>

<s:Keyframe time="2500" value="150"/>

<s:Keyframe time="2750" value="0"/>

<s:Keyframe time="3000" value="150"/>

<s:Keyframe time="3250" value="0"/>

<s:Keyframe time="3500" value="150"/>

<s:Keyframe time="3750" value="77"/>

</s:keyframes>

</s:MotionPath>

</s:motionPaths>

</s:AnimateTransform>

</fx:Declarations>

<s:Panel title="Spark KeyFrames Effect Example"

chromeColor="#000000"

color="#CCCCCC"

width="517"

height="329">

<mx:ApplicationControlBar width="515"

horizontalAlign="center">

<s:Label text="Click on Image for showing the effect"

fontFamily="verdana"

color="#000000"

x="93" y="41"/>

</mx:ApplicationControlBar>

<mx:Image id="footballImage"

source="@Embed(source='file:/C:/work/bikrant/image/football.png')"

click="{keyframeEffect.end();keyframeEffect.play();}"

x="0" y="77"/>

</s:Panel>

</s:Application>

Output:

Running Application:

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Posted on: July 6, 2010

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